8 best C# Coding Assessment libraries in 2025

C# is a powerful, imperative, functional, generic, object-oriented and flexible programming language that can be used to build desktop applications, mobile apps and web apps. It’s popular among developers for its ease of use and flexibility, but it’s also useful for non-developers who need to create scripts or automate repetitive tasks. Coding Assessment Framework is a set of tools that can be used to create coding assessments. It is based on the principles of unit testing and works as a framework for creating different types of automated tests. The framework has been used in many companies, schools, universities and other institutions around the world. They are free and open source. Many developers depend on the following C# Coding Assessment open source libraries: ip2region - offline IP location library with accuracy rate; AspNetCoreRateLimit - ASP.NET Core rate limiting middleware; WebApiThrottle - ASP.NET Web API rate limiter for IIS and Owin hosting.